The Block Composite Submarine Landslide, Southern New England Slope, U.S.A.: A Morphological Analysis
The Block Composite Submarine Landslide, Southern New England Slope, U.S.A.: A Morphological Analysis
复制标题
美国新英格兰南部斜坡块状复合海底滑坡：形态分析
DOI：
10.1007/978-90-481-3071-9_22
复制
发表时间：
2010
期刊：
影响因子：
3.7
通讯作者：
J. Chaytor
中科院分区：
文献类型：
--
作者：
J. Locat;U. S. Brink;J. Chaytor
最近沿大陆斜坡和新英格兰东南部上升的多波束测量使对区块复合滑坡的详细形态分析成为可能。这次滑坡至少由三个大的碎屑叶组成，这些碎屑叶位于一个小于0.5°的坡度上。滑移发生在第四纪沉积物中1°至5°的梯度上，可能是在与冰川相关的低海平面和高沉积速率时期沉积的。滑动碎片叶彼此非常接近，覆盖了大约1.125平方公里的海底。该矿床平均厚度为50米，总体积估计为36千米。在某些情况下，偏离区似乎位于大陆坡顶附近，水深在500米至2,000米之间，碎片散布在约20公里处，深度在2,500米至2,600米之间。根据初步分析，区块复合滑坡的至少一个波瓣(波瓣2)需要进一步研究，以评估其引发海啸的潜力。
Recent multibeam surveys along the continental slope and rise off southeast New England has enabled a detailed morphological analysis of the Block composite landslide. This landslide consists of at least three large debris lobes resting on a gradient less than 0.5 °. The slide took place on gradients of between 1 ° and 5 ° in Quaternary sediments likely deposited at the time of low sea level and high sedimentation rates associated with glaciations. The slide debris lobes are very close to each other and cover an area of about 1.125 km2 of the sea floor. With an average thickness of 50 m, the total volume of the deposit is estimated at 36 km3. In some cases, the departure zone appears to be near the crest of the continental slope, at a water depth between 500 and 2,000 m with debris spreading over about 20 km at a depth ranging from 2,500 to 2,600 m. From preliminary analysis, at least one lobe of the Block Composite slide (lobe 2) would require further study to evaluate its tsunamigenic potential.